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Title: Plasmon–Exciton Interactions Probed Using Spatial Coentrapment of Nanoparticles by Topological Singularities

Abstract

We study plasmon–exciton interaction by using topological singularities to spatially confine, selectively deliver, cotrap and optically probe colloidal semiconductor and plasmonic nanoparticles. The interaction is monitored in a single quantum system in the bulk of a liquid crystal medium where nanoparticles are manipulated and nanoconfined far from dielectric interfaces using laser tweezers and topological configurations containing singularities. When quantum dot-in-a-rod particles are spatially colocated with a plasmonic gold nanoburst particle in a topological singularity core, its fluorescence increases because blinking is significantly suppressed and the radiative decay rate increases by nearly an order of magnitude owing to the Purcell effect. Here, we argue that the blinking suppression is the result of the radiative rate change that mitigates Auger recombination and quantum dot ionization, consequently reducing nonradiative recombination. Finally, our work demonstrates that topological singularities are an effective platform for studying and controlling plasmon–exciton interactions.

Authors:
 [1];  [1];  [2];  [3]
  1. Univ. of Colorado, Boulder, CO (United States)
  2. Univ. of Colorado, Boulder, CO (United States). Liquid Crystal Materials Research Center; National Renewable Energy Lab. (NREL), Golden, CO (United States). Renewable and Sustainable Energy Inst.
  3. Univ. of Colorado, Boulder, CO (United States; National Renewable Energy Lab. (NREL), Golden, CO (United States). Renewable and Sustainable Energy Inst.
Publication Date:
Research Org.:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; National Science Foundation (NSF)
OSTI Identifier:
1595094
Grant/Contract Number:  
AC36-08GO28308; DMR-1410735
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 9; Journal Issue: 12; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; plasmonics; semiconductor nanocrystals; metal nanoparticles; topological singularities; blinking

Citation Formats

Ackerman, Paul J., Mundoor, Haridas, Smalyukh, Ivan I., and van de Lagemaat, Jao. Plasmon–Exciton Interactions Probed Using Spatial Coentrapment of Nanoparticles by Topological Singularities. United States: N. p., 2015. Web. doi:10.1021/acsnano.5b05715.
Ackerman, Paul J., Mundoor, Haridas, Smalyukh, Ivan I., & van de Lagemaat, Jao. Plasmon–Exciton Interactions Probed Using Spatial Coentrapment of Nanoparticles by Topological Singularities. United States. https://doi.org/10.1021/acsnano.5b05715
Ackerman, Paul J., Mundoor, Haridas, Smalyukh, Ivan I., and van de Lagemaat, Jao. Mon . "Plasmon–Exciton Interactions Probed Using Spatial Coentrapment of Nanoparticles by Topological Singularities". United States. https://doi.org/10.1021/acsnano.5b05715. https://www.osti.gov/servlets/purl/1595094.
@article{osti_1595094,
title = {Plasmon–Exciton Interactions Probed Using Spatial Coentrapment of Nanoparticles by Topological Singularities},
author = {Ackerman, Paul J. and Mundoor, Haridas and Smalyukh, Ivan I. and van de Lagemaat, Jao},
abstractNote = {We study plasmon–exciton interaction by using topological singularities to spatially confine, selectively deliver, cotrap and optically probe colloidal semiconductor and plasmonic nanoparticles. The interaction is monitored in a single quantum system in the bulk of a liquid crystal medium where nanoparticles are manipulated and nanoconfined far from dielectric interfaces using laser tweezers and topological configurations containing singularities. When quantum dot-in-a-rod particles are spatially colocated with a plasmonic gold nanoburst particle in a topological singularity core, its fluorescence increases because blinking is significantly suppressed and the radiative decay rate increases by nearly an order of magnitude owing to the Purcell effect. Here, we argue that the blinking suppression is the result of the radiative rate change that mitigates Auger recombination and quantum dot ionization, consequently reducing nonradiative recombination. Finally, our work demonstrates that topological singularities are an effective platform for studying and controlling plasmon–exciton interactions.},
doi = {10.1021/acsnano.5b05715},
url = {https://www.osti.gov/biblio/1595094}, journal = {ACS Nano},
issn = {1936-0851},
number = 12,
volume = 9,
place = {United States},
year = {2015},
month = {10}
}

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Cited by: 7 works
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